mcs/class/Mono.Security/Mono.Security.X509/PKCS12.cs

   1 //
   2 // PKCS12.cs: PKCS 12 - Personal Information Exchange Syntax
   3 //
   4 // Author:
   5 //      Sebastien Pouliot <sebastien@ximian.com>
   6 //
   7 // (C) 2003 Motus Technologies Inc. (http://www.motus.com)
   8 // (C) 2004 Novell (http://www.novell.com)
   9 //
  10 // Key derivation translated from Bouncy Castle JCE (http://www.bouncycastle.org/)
  11 // See bouncycastle.txt for license.
  12 //
  13
  14 //
  15 // Permission is hereby granted, free of charge, to any person obtaining
  16 // a copy of this software and associated documentation files (the
  17 // "Software"), to deal in the Software without restriction, including
  18 // without limitation the rights to use, copy, modify, merge, publish,
  19 // distribute, sublicense, and/or sell copies of the Software, and to
  20 // permit persons to whom the Software is furnished to do so, subject to
  21 // the following conditions:
  22 //
  23 // The above copyright notice and this permission notice shall be
  24 // included in all copies or substantial portions of the Software.
  25 //
  26 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  27 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  28 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  29 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  30 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  31 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  32 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  33 //
  34
  35 using System;
  36 using System.Collections;
  37 using System.IO;
  38 using System.Security.Cryptography;
  39 using System.Text;
  40
  41 using Mono.Security;
  42 using Mono.Security.Cryptography;
  43
  44 namespace Mono.Security.X509 {
  45
  46 #if INSIDE_CORLIB
  47         internal
  48 #else
  49         public
  50 #endif
  51         class PKCS5 {
  52
  53                 public const string pbeWithMD2AndDESCBC = "1.2.840.113549.1.5.1";
  54                 public const string pbeWithMD5AndDESCBC = "1.2.840.113549.1.5.3";
  55                 public const string pbeWithMD2AndRC2CBC = "1.2.840.113549.1.5.4";
  56                 public const string pbeWithMD5AndRC2CBC = "1.2.840.113549.1.5.6";
  57                 public const string pbeWithSHA1AndDESCBC = "1.2.840.113549.1.5.10";
  58                 public const string pbeWithSHA1AndRC2CBC = "1.2.840.113549.1.5.11";
  59
  60                 public PKCS5 () {}
  61         }
  62
  63 #if INSIDE_CORLIB
  64         internal
  65 #else
  66         public
  67 #endif
  68         class PKCS9 {
  69
  70                 public const string friendlyName = "1.2.840.113549.1.9.20";
  71                 public const string localKeyId = "1.2.840.113549.1.9.21";
  72
  73                 public PKCS9 () {}
  74         }
  75
  76
  77         internal class SafeBag {
  78                 private string _bagOID;
  79                 private ASN1 _asn1;
  80
  81                 public SafeBag(string bagOID, ASN1 asn1) {
  82                         _bagOID = bagOID;
  83                         _asn1 = asn1;
  84                 }
  85
  86                 public string BagOID {
  87                         get { return _bagOID; }
  88                 }
  89
  90                 public ASN1 ASN1 {
  91                         get { return _asn1; }
  92                 }
  93         }
  94
  95
  96 #if INSIDE_CORLIB
  97         internal
  98 #else
  99         public
 100 #endif
 101         class PKCS12 : ICloneable {
 102
 103                 public const string pbeWithSHAAnd128BitRC4 = "1.2.840.113549.1.12.1.1";
 104                 public const string pbeWithSHAAnd40BitRC4 = "1.2.840.113549.1.12.1.2";
 105                 public const string pbeWithSHAAnd3KeyTripleDESCBC = "1.2.840.113549.1.12.1.3";
 106                 public const string pbeWithSHAAnd2KeyTripleDESCBC = "1.2.840.113549.1.12.1.4";
 107                 public const string pbeWithSHAAnd128BitRC2CBC = "1.2.840.113549.1.12.1.5";
 108                 public const string pbeWithSHAAnd40BitRC2CBC = "1.2.840.113549.1.12.1.6";
 109
 110                 // bags
 111                 public const string keyBag  = "1.2.840.113549.1.12.10.1.1";
 112                 public const string pkcs8ShroudedKeyBag  = "1.2.840.113549.1.12.10.1.2";
 113                 public const string certBag  = "1.2.840.113549.1.12.10.1.3";
 114                 public const string crlBag  = "1.2.840.113549.1.12.10.1.4";
 115                 public const string secretBag  = "1.2.840.113549.1.12.10.1.5";
 116                 public const string safeContentsBag  = "1.2.840.113549.1.12.10.1.6";
 117
 118                 // types
 119                 public const string x509Certificate = "1.2.840.113549.1.9.22.1";
 120                 public const string sdsiCertificate = "1.2.840.113549.1.9.22.2";
 121                 public const string x509Crl = "1.2.840.113549.1.9.23.1";
 122
 123                 // Adapted from BouncyCastle PKCS12ParametersGenerator.java
 124                 public class DeriveBytes {
 125
 126                         public enum Purpose {
 127                                 Key,
 128                                 IV,
 129                                 MAC
 130                         }
 131
 132                         static private byte[] keyDiversifier = { 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1 };
 133                         static private byte[] ivDiversifier  = { 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2 };
 134                         static private byte[] macDiversifier = { 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3 };
 135
 136                         private string _hashName;
 137                         private int _iterations;
 138                         private byte[] _password;
 139                         private byte[] _salt;
 140
 141                         public DeriveBytes () {}
 142
 143                         public string HashName {
 144                                 get { return _hashName; }
 145                                 set { _hashName = value; }
 146                         }
 147
 148                         public int IterationCount {
 149                                 get { return _iterations; }
 150                                 set { _iterations = value; }
 151                         }
 152
 153                         public byte[] Password {
 154                                 get { return (byte[]) _password.Clone (); }
 155                                 set {
 156                                         if (value == null)
 157                                                 _password = new byte [0];
 158                                         else
 159                                                 _password = (byte[]) value.Clone ();
 160                                 }
 161                         }
 162
 163                         public byte[] Salt {
 164                                 get { return (byte[]) _salt.Clone ();  }
 165                                 set {
 166                                         if (value != null)
 167                                                 _salt = (byte[]) value.Clone ();
 168                                         else
 169                                                 _salt = null;
 170                                 }
 171                         }
 172
 173                         private void Adjust (byte[] a, int aOff, byte[] b)
 174                         {
 175                                 int x = (b[b.Length - 1] & 0xff) + (a [aOff + b.Length - 1] & 0xff) + 1;
 176
 177                                 a [aOff + b.Length - 1] = (byte) x;
 178                                 x >>= 8;
 179
 180                                 for (int i = b.Length - 2; i >= 0; i--) {
 181                                         x += (b [i] & 0xff) + (a [aOff + i] & 0xff);
 182                                         a [aOff + i] = (byte) x;
 183                                         x >>= 8;
 184                                 }
 185                         }
 186
 187                         private byte[] Derive (byte[] diversifier, int n)
 188                         {
 189                                 HashAlgorithm digest = HashAlgorithm.Create (_hashName);
 190                                 int u = (digest.HashSize >> 3); // div 8
 191                                 int v = 64;
 192                                 byte[] dKey = new byte [n];
 193
 194                                 byte[] S;
 195                                 if ((_salt != null) && (_salt.Length != 0)) {
 196                                         S = new byte[v * ((_salt.Length + v - 1) / v)];
 197
 198                                         for (int i = 0; i != S.Length; i++) {
 199                                                 S[i] = _salt[i % _salt.Length];
 200                                         }
 201                                 }
 202                                 else {
 203                                         S = new byte[0];
 204                                 }
 205
 206                                 byte[] P;
 207                                 if ((_password != null) && (_password.Length != 0)) {
 208                                         P = new byte[v * ((_password.Length + v - 1) / v)];
 209
 210                                         for (int i = 0; i != P.Length; i++) {
 211                                                 P[i] = _password[i % _password.Length];
 212                                         }
 213                                 }
 214                                 else {
 215                                         P = new byte[0];
 216                                 }
 217
 218                                 byte[] I = new byte [S.Length + P.Length];
 219
 220                                 Buffer.BlockCopy (S, 0, I, 0, S.Length);
 221                                 Buffer.BlockCopy (P, 0, I, S.Length, P.Length);
 222
 223                                 byte[]  B = new byte[v];
 224                                 int     c = (n + u - 1) / u;
 225
 226                                 for (int i = 1; i <= c; i++) {
 227                                         digest.TransformBlock (diversifier, 0, diversifier.Length, diversifier, 0);
 228                                         digest.TransformFinalBlock (I, 0, I.Length);
 229                                         byte[] A = digest.Hash;
 230                                         digest.Initialize ();
 231                                         for (int j = 1; j != _iterations; j++) {
 232                                                 A = digest.ComputeHash (A, 0, A.Length);
 233                                         }
 234
 235                                         for (int j = 0; j != B.Length; j++) {
 236                                                 B [j] = A [j % A.Length];
 237                                         }
 238
 239                                         for (int j = 0; j != I.Length / v; j++) {
 240                                                 Adjust (I, j * v, B);
 241                                         }
 242
 243                                         if (i == c) {
 244                                                 Buffer.BlockCopy(A, 0, dKey, (i - 1) * u, dKey.Length - ((i - 1) * u));
 245                                         }
 246                                         else {
 247                                                 Buffer.BlockCopy(A, 0, dKey, (i - 1) * u, A.Length);
 248                                         }
 249                                 }
 250
 251                                 return dKey;
 252                         }
 253
 254                         public byte[] DeriveKey (int size)
 255                         {
 256                                 return Derive (keyDiversifier, size);
 257                         }
 258
 259                         public byte[] DeriveIV (int size)
 260                         {
 261                                 return Derive (ivDiversifier, size);
 262                         }
 263
 264                         public byte[] DeriveMAC (int size)
 265                         {
 266                                 return Derive (macDiversifier, size);
 267                         }
 268                 }
 269
 270                 static private int recommendedIterationCount = 2000;
 271
 272                 private int _version;
 273                 private byte[] _password;
 274                 private ArrayList _keyBags;
 275                 private X509CertificateCollection _certs;
 276                 private bool _keyBagsChanged;
 277                 private bool _certsChanged;
 278                 private int _iterations;
 279                 private ArrayList _safeBags;
 280                 private RandomNumberGenerator _rng;
 281
 282                 // constructors
 283
 284                 public PKCS12 ()
 285                 {
 286                         _iterations = recommendedIterationCount;
 287                         _keyBags = new ArrayList ();
 288                         _certs = new X509CertificateCollection ();
 289                         _keyBagsChanged = false;
 290                         _certsChanged = false;
 291                         _safeBags = new ArrayList ();
 292                 }
 293
 294                 public PKCS12 (byte[] data) : this (data, null) {}
 295
 296                 /*
 297                  * PFX ::= SEQUENCE {
 298                  *      version INTEGER {v3(3)}(v3,...),
 299                  *      authSafe ContentInfo,
 300                  *      macData MacData OPTIONAL
 301                  * }
 302                  *
 303                  * MacData ::= SEQUENCE {
 304                  *      mac DigestInfo,
 305                  *      macSalt OCTET STRING,
 306                  *      iterations INTEGER DEFAULT 1
 307                  *      -- Note: The default is for historical reasons and its use is deprecated. A higher
 308                  *      -- value, like 1024 is recommended.
 309                  * }
 310                  *
 311                  * SafeContents ::= SEQUENCE OF SafeBag
 312                  *
 313                  * SafeBag ::= SEQUENCE {
 314                  *      bagId BAG-TYPE.&id ({PKCS12BagSet}),
 315                  *      bagValue [0] EXPLICIT BAG-TYPE.&Type({PKCS12BagSet}{@bagId}),
 316                  *      bagAttributes SET OF PKCS12Attribute OPTIONAL
 317                  * }
 318                  */
 319                 public PKCS12 (byte[] data, string password) : this ()
 320                 {
 321                         Password = password;
 322
 323                         ASN1 pfx = new ASN1 (data);
 324                         if (pfx.Tag != 0x30)
 325                                 throw new ArgumentException ("invalid data");
 326
 327                         ASN1 version = pfx [0];
 328                         if (version.Tag != 0x02)
 329                                 throw new ArgumentException ("invalid PFX version");
 330                         _version = version.Value [0];
 331
 332                         PKCS7.ContentInfo authSafe = new PKCS7.ContentInfo (pfx [1]);
 333                         if (authSafe.ContentType != PKCS7.Oid.data)
 334                                 throw new ArgumentException ("invalid authenticated safe");
 335
 336                         // now that we know it's a PKCS#12 file, check the (optional) MAC
 337                         // before decoding anything else in the file
 338                         if (pfx.Count > 2) {
 339                                 ASN1 macData = pfx [2];
 340                                 if (macData.Tag != 0x30)
 341                                         throw new ArgumentException ("invalid MAC");
 342
 343                                 ASN1 mac = macData [0];
 344                                 if (mac.Tag != 0x30)
 345                                         throw new ArgumentException ("invalid MAC");
 346                                 ASN1 macAlgorithm = mac [0];
 347                                 string macOid = ASN1Convert.ToOid (macAlgorithm [0]);
 348                                 if (macOid != "1.3.14.3.2.26")
 349                                         throw new ArgumentException ("unsupported HMAC");
 350                                 byte[] macValue = mac [1].Value;
 351
 352                                 ASN1 macSalt = macData [1];
 353                                 if (macSalt.Tag != 0x04)
 354                                         throw new ArgumentException ("missing MAC salt");
 355
 356                                 _iterations = 1; // default value
 357                                 if (macData.Count > 2) {
 358                                         ASN1 iters = macData [2];
 359                                         if (iters.Tag != 0x02)
 360                                                 throw new ArgumentException ("invalid MAC iteration");
 361                                         _iterations = ASN1Convert.ToInt32 (iters);
 362                                 }
 363
 364                                 byte[] authSafeData = authSafe.Content [0].Value;
 365                                 byte[] calculatedMac = MAC (_password, macSalt.Value, _iterations, authSafeData);
 366                                 if (!Compare (macValue, calculatedMac))
 367                                         throw new CryptographicException ("Invalid MAC - file may have been tampered!");
 368                         }
 369
 370                         // we now returns to our original presentation - PFX
 371                         ASN1 authenticatedSafe = new ASN1 (authSafe.Content [0].Value);
 372                         for (int i=0; i < authenticatedSafe.Count; i++) {
 373                                 PKCS7.ContentInfo ci = new PKCS7.ContentInfo (authenticatedSafe [i]);
 374                                 switch (ci.ContentType) {
 375                                         case PKCS7.Oid.data:
 376                                                 // unencrypted (by PKCS#12)
 377                                                 ASN1 safeContents = new ASN1 (ci.Content [0].Value);
 378                                                 for (int j=0; j < safeContents.Count; j++) {
 379                                                         ASN1 safeBag = safeContents [j];
 380                                                         ReadSafeBag (safeBag);
 381                                                 }
 382                                                 break;
 383                                         case PKCS7.Oid.encryptedData:
 384                                                 // password encrypted
 385                                                 PKCS7.EncryptedData ed = new PKCS7.EncryptedData (ci.Content [0]);
 386                                                 ASN1 decrypted = new ASN1 (Decrypt (ed));
 387                                                 for (int j=0; j < decrypted.Count; j++) {
 388                                                         ASN1 safeBag = decrypted [j];
 389                                                         ReadSafeBag (safeBag);
 390                                                 }
 391                                                 break;
 392                                         case PKCS7.Oid.envelopedData:
 393                                                 // public key encrypted
 394                                                 throw new NotImplementedException ("public key encrypted");
 395                                         default:
 396                                                 throw new ArgumentException ("unknown authenticatedSafe");
 397                                 }
 398                         }
 399                 }
 400
 401                 ~PKCS12 ()
 402                 {
 403                         if (_password != null) {
 404                                 Array.Clear (_password, 0, _password.Length);
 405                         }
 406                         _password = null;
 407                 }
 408
 409                 // properties
 410
 411                 public string Password {
 412                         set {
 413                                 if (value != null) {
 414                                         if (value.EndsWith ("\0"))
 415                                                 _password = Encoding.BigEndianUnicode.GetBytes (value);
 416                                         else
 417                                                 _password = Encoding.BigEndianUnicode.GetBytes (value + "\0");
 418                                 }
 419                                 else
 420                                         _password = null;       // no password
 421                         }
 422                 }
 423
 424                 public int IterationCount {
 425                         get { return _iterations; }
 426                         set { _iterations = value; }
 427                 }
 428
 429                 public ArrayList Keys {
 430                         get {
 431                                 if (_keyBagsChanged) {
 432                                         _keyBags.Clear ();
 433                                         foreach (SafeBag sb in _safeBags) {
 434                                                 if (sb.BagOID.Equals (keyBag)) {
 435                                                         ASN1 safeBag = sb.ASN1;
 436                                                         ASN1 bagValue = safeBag [1];
 437                                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
 438                                                         byte[] privateKey = pki.PrivateKey;
 439                                                         switch (privateKey [0]) {
 440                                                         case 0x02:
 441                                                                 DSAParameters p = new DSAParameters (); // FIXME
 442                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
 443                                                                 break;
 444                                                         case 0x30:
 445                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
 446                                                                 break;
 447                                                         default:
 448                                                                 break;
 449                                                         }
 450                                                         Array.Clear (privateKey, 0, privateKey.Length);
 451
 452                                                 } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
 453                                                         ASN1 safeBag = sb.ASN1;
 454                                                         ASN1 bagValue = safeBag [1];
 455                                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
 456                                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
 457                                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
 458                                                         byte[] privateKey = pki.PrivateKey;
 459                                                         switch (privateKey [0]) {
 460                                                         case 0x02:
 461                                                                 DSAParameters p = new DSAParameters (); // FIXME
 462                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
 463                                                                 break;
 464                                                         case 0x30:
 465                                                                 _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
 466                                                                 break;
 467                                                         default:
 468                                                                 break;
 469                                                         }
 470                                                         Array.Clear (privateKey, 0, privateKey.Length);
 471                                                         Array.Clear (decrypted, 0, decrypted.Length);
 472                                                 }
 473                                         }
 474                                         _keyBagsChanged = false;
 475                                 }
 476                                 return ArrayList.ReadOnly(_keyBags);
 477                         }
 478                 }
 479
 480                 public X509CertificateCollection Certificates {
 481                         get {
 482                                 if (_certsChanged) {
 483                                         _certs.Clear ();
 484                                         foreach (SafeBag sb in _safeBags) {
 485                                                 if (sb.BagOID.Equals (certBag)) {
 486                                                         ASN1 safeBag = sb.ASN1;
 487                                                         ASN1 bagValue = safeBag [1];
 488                                                         PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
 489                                                         _certs.Add (new X509Certificate (cert.Content [0].Value));
 490                                                 }
 491                                         }
 492                                         _certsChanged = false;
 493                                 }
 494                                 return _certs;
 495                         }
 496                 }
 497
 498                 internal RandomNumberGenerator RNG {
 499                         get {
 500                                 if (_rng == null)
 501                                         _rng = RandomNumberGenerator.Create ();
 502                                 return _rng;
 503                         }
 504                 }
 505
 506                 // private methods
 507
 508                 private bool Compare (byte[] expected, byte[] actual)
 509                 {
 510                         bool compare = false;
 511                         if (expected.Length == actual.Length) {
 512                                 for (int i=0; i < expected.Length; i++) {
 513                                         if (expected [i] != actual [i])
 514                                                 return false;
 515                                 }
 516                                 compare = true;
 517                         }
 518                         return compare;
 519                 }
 520
 521                 private SymmetricAlgorithm GetSymmetricAlgorithm (string algorithmOid, byte[] salt, int iterationCount)
 522                 {
 523                         string algorithm = null;
 524                         int keyLength = 8;      // 64 bits (default)
 525                         int ivLength = 8;       // 64 bits (default)
 526
 527                         PKCS12.DeriveBytes pd = new PKCS12.DeriveBytes ();
 528                         pd.Password = _password;
 529                         pd.Salt = salt;
 530                         pd.IterationCount = iterationCount;
 531
 532                         switch (algorithmOid) {
 533                                 case PKCS5.pbeWithMD2AndDESCBC:                 // no unit test available
 534                                         pd.HashName = "MD2";
 535                                         algorithm = "DES";
 536                                         break;
 537                                 case PKCS5.pbeWithMD5AndDESCBC:                 // no unit test available
 538                                         pd.HashName = "MD5";
 539                                         algorithm = "DES";
 540                                         break;
 541                                 case PKCS5.pbeWithMD2AndRC2CBC:                 // no unit test available
 542                                         // TODO - RC2-CBC-Parameter (PKCS5)
 543                                         // if missing default to 32 bits !!!
 544                                         pd.HashName = "MD2";
 545                                         algorithm = "RC2";
 546                                         keyLength = 4;          // default
 547                                         break;
 548                                 case PKCS5.pbeWithMD5AndRC2CBC:                 // no unit test available
 549                                         // TODO - RC2-CBC-Parameter (PKCS5)
 550                                         // if missing default to 32 bits !!!
 551                                         pd.HashName = "MD5";
 552                                         algorithm = "RC2";
 553                                         keyLength = 4;          // default
 554                                         break;
 555                                 case PKCS5.pbeWithSHA1AndDESCBC:                // no unit test available
 556                                         pd.HashName = "SHA1";
 557                                         algorithm = "DES";
 558                                         break;
 559                                 case PKCS5.pbeWithSHA1AndRC2CBC:                // no unit test available
 560                                         // TODO - RC2-CBC-Parameter (PKCS5)
 561                                         // if missing default to 32 bits !!!
 562                                         pd.HashName = "SHA1";
 563                                         algorithm = "RC2";
 564                                         keyLength = 4;          // default
 565                                         break;
 566                                 case PKCS12.pbeWithSHAAnd128BitRC4:             // no unit test available
 567                                         pd.HashName = "SHA1";
 568                                         algorithm = "RC4";
 569                                         keyLength = 16;
 570                                         ivLength = 0;           // N/A
 571                                         break;
 572                                 case PKCS12.pbeWithSHAAnd40BitRC4:              // no unit test available
 573                                         pd.HashName = "SHA1";
 574                                         algorithm = "RC4";
 575                                         keyLength = 5;
 576                                         ivLength = 0;           // N/A
 577                                         break;
 578                                 case PKCS12.pbeWithSHAAnd3KeyTripleDESCBC:
 579                                         pd.HashName = "SHA1";
 580                                         algorithm = "TripleDES";
 581                                         keyLength = 24;
 582                                         break;
 583                                 case PKCS12.pbeWithSHAAnd2KeyTripleDESCBC:      // no unit test available
 584                                         pd.HashName = "SHA1";
 585                                         algorithm = "TripleDES";
 586                                         keyLength = 16;
 587                                         break;
 588                                 case PKCS12.pbeWithSHAAnd128BitRC2CBC:          // no unit test available
 589                                         pd.HashName = "SHA1";
 590                                         algorithm = "RC2";
 591                                         keyLength = 16;
 592                                         break;
 593                                 case PKCS12.pbeWithSHAAnd40BitRC2CBC:
 594                                         pd.HashName = "SHA1";
 595                                         algorithm = "RC2";
 596                                         keyLength = 5;
 597                                         break;
 598                                 default:
 599                                         throw new NotSupportedException ("unknown oid " + algorithm);
 600                         }
 601
 602                         SymmetricAlgorithm sa = SymmetricAlgorithm.Create (algorithm);
 603                         sa.Key = pd.DeriveKey (keyLength);
 604                         // IV required only for block ciphers (not stream ciphers)
 605                         if (ivLength > 0) {
 606                                 sa.IV = pd.DeriveIV (ivLength);
 607                                 sa.Mode = CipherMode.CBC;
 608                         }
 609                         return sa;
 610                 }
 611
 612                 public byte[] Decrypt (string algorithmOid, byte[] salt, int iterationCount, byte[] encryptedData)
 613                 {
 614                         SymmetricAlgorithm sa = null;
 615                         byte[] result = null;
 616                         try {
 617                                 sa = GetSymmetricAlgorithm (algorithmOid, salt, iterationCount);
 618                                 ICryptoTransform ct = sa.CreateDecryptor ();
 619                                 result = ct.TransformFinalBlock (encryptedData, 0, encryptedData.Length);
 620                         }
 621                         finally {
 622                                 if (sa != null)
 623                                         sa.Clear ();
 624                         }
 625                         return result;
 626                 }
 627
 628                 public byte[] Decrypt (PKCS7.EncryptedData ed)
 629                 {
 630                         return Decrypt (ed.EncryptionAlgorithm.ContentType,
 631                                 ed.EncryptionAlgorithm.Content [0].Value,
 632                                 ASN1Convert.ToInt32 (ed.EncryptionAlgorithm.Content [1]),
 633                                 ed.EncryptedContent);
 634                 }
 635
 636                 public byte[] Encrypt (string algorithmOid, byte[] salt, int iterationCount, byte[] data)
 637                 {
 638                         byte[] result = null;
 639                         using (SymmetricAlgorithm sa = GetSymmetricAlgorithm (algorithmOid, salt, iterationCount)) {
 640                                 ICryptoTransform ct = sa.CreateEncryptor ();
 641                                 result = ct.TransformFinalBlock (data, 0, data.Length);
 642                         }
 643                         return result;
 644                 }
 645
 646                 private void AddPrivateKey (PKCS8.PrivateKeyInfo pki)
 647                 {
 648                         byte[] privateKey = pki.PrivateKey;
 649                         switch (privateKey [0]) {
 650                                 case 0x02:
 651                                         DSAParameters p = new DSAParameters (); // FIXME
 652                                         _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p));
 653                                         break;
 654                                 case 0x30:
 655                                         _keyBags.Add (PKCS8.PrivateKeyInfo.DecodeRSA (privateKey));
 656                                         break;
 657                                 default:
 658                                         Array.Clear (privateKey, 0, privateKey.Length);
 659                                         throw new CryptographicException ("Unknown private key format");
 660                         }
 661                         Array.Clear (privateKey, 0, privateKey.Length);
 662                 }
 663
 664                 private void ReadSafeBag (ASN1 safeBag)
 665                 {
 666                         if (safeBag.Tag != 0x30)
 667                                 throw new ArgumentException ("invalid safeBag");
 668
 669                         ASN1 bagId = safeBag [0];
 670                         if (bagId.Tag != 0x06)
 671                                 throw new ArgumentException ("invalid safeBag id");
 672
 673                         ASN1 bagValue = safeBag [1];
 674                         string oid = ASN1Convert.ToOid (bagId);
 675                         switch (oid) {
 676                                 case keyBag:
 677                                         // NEED UNIT TEST
 678                                         AddPrivateKey (new PKCS8.PrivateKeyInfo (bagValue.Value));
 679                                         break;
 680                                 case pkcs8ShroudedKeyBag:
 681                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
 682                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
 683                                         AddPrivateKey (new PKCS8.PrivateKeyInfo (decrypted));
 684                                         Array.Clear (decrypted, 0, decrypted.Length);
 685                                         break;
 686                                 case certBag:
 687                                         PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
 688                                         if (cert.ContentType != x509Certificate)
 689                                                 throw new NotSupportedException ("unsupport certificate type");
 690                                         X509Certificate x509 = new X509Certificate (cert.Content [0].Value);
 691                                         _certs.Add (x509);
 692                                         break;
 693                                 case crlBag:
 694                                         // TODO
 695                                         break;
 696                                 case secretBag:
 697                                         // TODO
 698                                         break;
 699                                 case safeContentsBag:
 700                                         // TODO - ? recurse ?
 701                                         break;
 702                                 default:
 703                                         throw new ArgumentException ("unknown safeBag oid");
 704                         }
 705
 706                         if (safeBag.Count > 2) {
 707                                 ASN1 bagAttributes = safeBag [2];
 708                                 if (bagAttributes.Tag != 0x31)
 709                                         throw new ArgumentException ("invalid safeBag attributes id");
 710
 711                                 for (int i = 0; i < bagAttributes.Count; i++) {
 712                                         ASN1 pkcs12Attribute = bagAttributes[i];
 713
 714                                         if (pkcs12Attribute.Tag != 0x30)
 715                                                 throw new ArgumentException ("invalid PKCS12 attributes id");
 716
 717                                         ASN1 attrId = pkcs12Attribute [0];
 718                                         if (attrId.Tag != 0x06)
 719                                                 throw new ArgumentException ("invalid attribute id");
 720
 721                                         string attrOid = ASN1Convert.ToOid (attrId);
 722
 723                                         ASN1 attrValues = pkcs12Attribute[1];
 724                                         for (int j = 0; j < attrValues.Count; j++) {
 725                                                 ASN1 attrValue = attrValues[j];
 726
 727                                                 switch (attrOid) {
 728                                                 case PKCS9.friendlyName:
 729                                                         if (attrValue.Tag != 0x1e)
 730                                                                 throw new ArgumentException ("invalid attribute value id");
 731                                                         break;
 732                                                 case PKCS9.localKeyId:
 733                                                         if (attrValue.Tag != 0x04)
 734                                                                 throw new ArgumentException ("invalid attribute value id");
 735                                                         break;
 736                                                 default:
 737                                                         // Unknown OID -- don't check Tag
 738                                                         break;
 739                                                 }
 740                                         }
 741                                 }
 742                         }
 743
 744                         _safeBags.Add (new SafeBag(oid, safeBag));
 745                 }
 746
 747                 private ASN1 Pkcs8ShroudedKeyBagSafeBag (AsymmetricAlgorithm aa, IDictionary attributes)
 748                 {
 749                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo ();
 750                         if (aa is RSA) {
 751                                 pki.Algorithm = "1.2.840.113549.1.1.1";
 752                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((RSA)aa);
 753                         }
 754                         else if (aa is DSA) {
 755                                 pki.Algorithm = null;
 756                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((DSA)aa);
 757                         }
 758                         else
 759                                 throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
 760
 761                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo ();
 762                         epki.Algorithm = pbeWithSHAAnd3KeyTripleDESCBC;
 763                         epki.IterationCount = _iterations;
 764                         epki.EncryptedData = Encrypt (pbeWithSHAAnd3KeyTripleDESCBC, epki.Salt, _iterations, pki.GetBytes ());
 765
 766                         ASN1 safeBag = new ASN1 (0x30);
 767                         safeBag.Add (ASN1Convert.FromOid (pkcs8ShroudedKeyBag));
 768                         ASN1 bagValue = new ASN1 (0xA0);
 769                         bagValue.Add (new ASN1 (epki.GetBytes ()));
 770                         safeBag.Add (bagValue);
 771
 772                         if (attributes != null) {
 773                                 ASN1 bagAttributes = new ASN1 (0x31);
 774                                 IDictionaryEnumerator de = attributes.GetEnumerator ();
 775
 776                                 while (de.MoveNext ()) {
 777                                         string oid = (string)de.Key;
 778                                         switch (oid) {
 779                                         case PKCS9.friendlyName:
 780                                                 ArrayList names = (ArrayList)de.Value;
 781                                                 if (names.Count > 0) {
 782                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 783                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
 784                                                         ASN1 attrValues = new ASN1 (0x31);
 785                                                         foreach (byte[] name in names) {
 786                                                                 ASN1 attrValue = new ASN1 (0x1e);
 787                                                                 attrValue.Value = name;
 788                                                                 attrValues.Add (attrValue);
 789                                                         }
 790                                                         pkcs12Attribute.Add (attrValues);
 791                                                         bagAttributes.Add (pkcs12Attribute);
 792                                                 }
 793                                                 break;
 794                                         case PKCS9.localKeyId:
 795                                                 ArrayList keys = (ArrayList)de.Value;
 796                                                 if (keys.Count > 0) {
 797                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 798                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
 799                                                         ASN1 attrValues = new ASN1 (0x31);
 800                                                         foreach (byte[] key in keys) {
 801                                                                 ASN1 attrValue = new ASN1 (0x04);
 802                                                                 attrValue.Value = key;
 803                                                                 attrValues.Add (attrValue);
 804                                                         }
 805                                                         pkcs12Attribute.Add (attrValues);
 806                                                         bagAttributes.Add (pkcs12Attribute);
 807                                                 }
 808                                                 break;
 809                                         default:
 810                                                 break;
 811                                         }
 812                                 }
 813
 814                                 if (bagAttributes.Count > 0) {
 815                                         safeBag.Add (bagAttributes);
 816                                 }
 817                         }
 818
 819                         return safeBag;
 820                 }
 821
 822                 private ASN1 KeyBagSafeBag (AsymmetricAlgorithm aa, IDictionary attributes)
 823                 {
 824                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo ();
 825                         if (aa is RSA) {
 826                                 pki.Algorithm = "1.2.840.113549.1.1.1";
 827                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((RSA)aa);
 828                         }
 829                         else if (aa is DSA) {
 830                                 pki.Algorithm = null;
 831                                 pki.PrivateKey = PKCS8.PrivateKeyInfo.Encode ((DSA)aa);
 832                         }
 833                         else
 834                                 throw new CryptographicException ("Unknown asymmetric algorithm {0}", aa.ToString ());
 835
 836                         ASN1 safeBag = new ASN1 (0x30);
 837                         safeBag.Add (ASN1Convert.FromOid (keyBag));
 838                         ASN1 bagValue = new ASN1 (0xA0);
 839                         bagValue.Add (new ASN1 (pki.GetBytes ()));
 840                         safeBag.Add (bagValue);
 841
 842                         if (attributes != null) {
 843                                 ASN1 bagAttributes = new ASN1 (0x31);
 844                                 IDictionaryEnumerator de = attributes.GetEnumerator ();
 845
 846                                 while (de.MoveNext ()) {
 847                                         string oid = (string)de.Key;
 848                                         switch (oid) {
 849                                         case PKCS9.friendlyName:
 850                                                 ArrayList names = (ArrayList)de.Value;
 851                                                 if (names.Count > 0) {
 852                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 853                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
 854                                                         ASN1 attrValues = new ASN1 (0x31);
 855                                                         foreach (byte[] name in names) {
 856                                                                 ASN1 attrValue = new ASN1 (0x1e);
 857                                                                 attrValue.Value = name;
 858                                                                 attrValues.Add (attrValue);
 859                                                         }
 860                                                         pkcs12Attribute.Add (attrValues);
 861                                                         bagAttributes.Add (pkcs12Attribute);
 862                                                 }
 863                                                 break;
 864                                         case PKCS9.localKeyId:
 865                                                 ArrayList keys = (ArrayList)de.Value;
 866                                                 if (keys.Count > 0) {
 867                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 868                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
 869                                                         ASN1 attrValues = new ASN1 (0x31);
 870                                                         foreach (byte[] key in keys) {
 871                                                                 ASN1 attrValue = new ASN1 (0x04);
 872                                                                 attrValue.Value = key;
 873                                                                 attrValues.Add (attrValue);
 874                                                         }
 875                                                         pkcs12Attribute.Add (attrValues);
 876                                                         bagAttributes.Add (pkcs12Attribute);
 877                                                 }
 878                                                 break;
 879                                         default:
 880                                                 break;
 881                                         }
 882                                 }
 883
 884                                 if (bagAttributes.Count > 0) {
 885                                         safeBag.Add (bagAttributes);
 886                                 }
 887                         }
 888
 889                         return safeBag;
 890                 }
 891
 892                 private ASN1 CertificateSafeBag (X509Certificate x509, IDictionary attributes)
 893                 {
 894                         ASN1 encapsulatedCertificate = new ASN1 (0x04, x509.RawData);
 895
 896                         PKCS7.ContentInfo ci = new PKCS7.ContentInfo ();
 897                         ci.ContentType = x509Certificate;
 898                         ci.Content.Add (encapsulatedCertificate);
 899
 900                         ASN1 bagValue = new ASN1 (0xA0);
 901                         bagValue.Add (ci.ASN1);
 902
 903                         ASN1 safeBag = new ASN1 (0x30);
 904                         safeBag.Add (ASN1Convert.FromOid (certBag));
 905                         safeBag.Add (bagValue);
 906
 907                         if (attributes != null) {
 908                                 ASN1 bagAttributes = new ASN1 (0x31);
 909                                 IDictionaryEnumerator de = attributes.GetEnumerator ();
 910
 911                                 while (de.MoveNext ()) {
 912                                         string oid = (string)de.Key;
 913                                         switch (oid) {
 914                                         case PKCS9.friendlyName:
 915                                                 ArrayList names = (ArrayList)de.Value;
 916                                                 if (names.Count > 0) {
 917                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 918                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.friendlyName));
 919                                                         ASN1 attrValues = new ASN1 (0x31);
 920                                                         foreach (byte[] name in names) {
 921                                                                 ASN1 attrValue = new ASN1 (0x1e);
 922                                                                 attrValue.Value = name;
 923                                                                 attrValues.Add (attrValue);
 924                                                         }
 925                                                         pkcs12Attribute.Add (attrValues);
 926                                                         bagAttributes.Add (pkcs12Attribute);
 927                                                 }
 928                                                 break;
 929                                         case PKCS9.localKeyId:
 930                                                 ArrayList keys = (ArrayList)de.Value;
 931                                                 if (keys.Count > 0) {
 932                                                         ASN1 pkcs12Attribute = new ASN1 (0x30);
 933                                                         pkcs12Attribute.Add (ASN1Convert.FromOid (PKCS9.localKeyId));
 934                                                         ASN1 attrValues = new ASN1 (0x31);
 935                                                         foreach (byte[] key in keys) {
 936                                                                 ASN1 attrValue = new ASN1 (0x04);
 937                                                                 attrValue.Value = key;
 938                                                                 attrValues.Add (attrValue);
 939                                                         }
 940                                                         pkcs12Attribute.Add (attrValues);
 941                                                         bagAttributes.Add (pkcs12Attribute);
 942                                                 }
 943                                                 break;
 944                                         default:
 945                                                 break;
 946                                         }
 947                                 }
 948
 949                                 if (bagAttributes.Count > 0) {
 950                                         safeBag.Add (bagAttributes);
 951                                 }
 952                         }
 953
 954                         return safeBag;
 955                 }
 956
 957                 private byte[] MAC (byte[] password, byte[] salt, int iterations, byte[] data)
 958                 {
 959                         PKCS12.DeriveBytes pd = new PKCS12.DeriveBytes ();
 960                         pd.HashName = "SHA1";
 961                         pd.Password = password;
 962                         pd.Salt = salt;
 963                         pd.IterationCount = iterations;
 964
 965                         HMACSHA1 hmac = (HMACSHA1) HMACSHA1.Create ();
 966                         hmac.Key = pd.DeriveMAC (20);
 967                         return hmac.ComputeHash (data, 0, data.Length);
 968                 }
 969
 970                 /*
 971                  * SafeContents ::= SEQUENCE OF SafeBag
 972                  *
 973                  * SafeBag ::= SEQUENCE {
 974                  *      bagId BAG-TYPE.&id ({PKCS12BagSet}),
 975                  *      bagValue [0] EXPLICIT BAG-TYPE.&Type({PKCS12BagSet}{@bagId}),
 976                  *      bagAttributes SET OF PKCS12Attribute OPTIONAL
 977                  * }
 978                  */
 979                 public byte[] GetBytes ()
 980                 {
 981                         // TODO (incomplete)
 982                         ASN1 safeBagSequence = new ASN1 (0x30);
 983
 984                         // Sync Safe Bag list since X509CertificateCollection may be updated
 985                         ArrayList scs = new ArrayList ();
 986                         foreach (SafeBag sb in _safeBags) {
 987                                 if (sb.BagOID.Equals (certBag)) {
 988                                         ASN1 safeBag = sb.ASN1;
 989                                         ASN1 bagValue = safeBag [1];
 990                                         PKCS7.ContentInfo cert = new PKCS7.ContentInfo (bagValue.Value);
 991                                         scs.Add (new X509Certificate (cert.Content [0].Value));
 992                                 }
 993                         }
 994
 995                         ArrayList addcerts = new ArrayList ();
 996                         ArrayList removecerts = new ArrayList ();
 997
 998                         foreach (X509Certificate c in Certificates) {
 999                                 bool found = false;
1000
1001                                 foreach (X509Certificate lc in scs) {
1002                                         if (Compare (c.RawData, lc.RawData)) {
1003                                                 found = true;
1004                                         }
1005                                 }
1006
1007                                 if (!found) {
1008                                         addcerts.Add (c);
1009                                 }
1010                         }
1011                         foreach (X509Certificate c in scs) {
1012                                 bool found = false;
1013
1014                                 foreach (X509Certificate lc in Certificates) {
1015                                         if (Compare (c.RawData, lc.RawData)) {
1016                                                 found = true;
1017                                         }
1018                                 }
1019
1020                                 if (!found) {
1021                                         removecerts.Add (c);
1022                                 }
1023                         }
1024
1025                         foreach (X509Certificate c in removecerts) {
1026                                 RemoveCertificate (c);
1027                         }
1028
1029                         foreach (X509Certificate c in addcerts) {
1030                                 AddCertificate (c);
1031                         }
1032                         // Sync done
1033
1034                         if (_safeBags.Count > 0) {
1035                                 ASN1 certsSafeBag = new ASN1 (0x30);
1036                                 foreach (SafeBag sb in _safeBags) {
1037                                         if (sb.BagOID.Equals (certBag)) {
1038                                                 certsSafeBag.Add (sb.ASN1);
1039                                         }
1040                                 }
1041
1042                                 if (certsSafeBag.Count > 0) {
1043                                         byte[] certsSalt = new byte [8];
1044                                         RNG.GetBytes (certsSalt);
1045
1046                                         ASN1 seqParams = new ASN1 (0x30);
1047                                         seqParams.Add (new ASN1 (0x04, certsSalt));
1048                                         seqParams.Add (ASN1Convert.FromInt32 (_iterations));
1049
1050                                         ASN1 seqPbe = new ASN1 (0x30);
1051                                         seqPbe.Add (ASN1Convert.FromOid (pbeWithSHAAnd3KeyTripleDESCBC));
1052                                         seqPbe.Add (seqParams);
1053
1054                                         byte[] encrypted = Encrypt (pbeWithSHAAnd3KeyTripleDESCBC, certsSalt, _iterations, certsSafeBag.GetBytes ());
1055                                         ASN1 encryptedCerts = new ASN1 (0x80, encrypted);
1056
1057                                         ASN1 seq = new ASN1 (0x30);
1058                                         seq.Add (ASN1Convert.FromOid (PKCS7.Oid.data));
1059                                         seq.Add (seqPbe);
1060                                         seq.Add (encryptedCerts);
1061
1062                                         ASN1 certsVersion = new ASN1 (0x02, new byte [1] { 0x00 });
1063                                         ASN1 encData = new ASN1 (0x30);
1064                                         encData.Add (certsVersion);
1065                                         encData.Add (seq);
1066
1067                                         ASN1 certsContent = new ASN1 (0xA0);
1068                                         certsContent.Add (encData);
1069
1070                                         PKCS7.ContentInfo bag = new PKCS7.ContentInfo (PKCS7.Oid.encryptedData);
1071                                         bag.Content = certsContent;
1072                                         safeBagSequence.Add (bag.ASN1);
1073                                 }
1074                         }
1075
1076                         if (_safeBags.Count > 0) {
1077                                 ASN1 safeContents = new ASN1 (0x30);
1078                                 foreach (SafeBag sb in _safeBags) {
1079                                         if (sb.BagOID.Equals (keyBag) ||
1080                                             sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1081                                                 safeContents.Add (sb.ASN1);
1082                                         }
1083                                 }
1084                                 if (safeContents.Count > 0) {
1085                                         ASN1 content = new ASN1 (0xA0);
1086                                         content.Add (new ASN1 (0x04, safeContents.GetBytes ()));
1087
1088                                         PKCS7.ContentInfo keyBag = new PKCS7.ContentInfo (PKCS7.Oid.data);
1089                                         keyBag.Content = content;
1090                                         safeBagSequence.Add (keyBag.ASN1);
1091                                 }
1092                         }
1093
1094
1095                         ASN1 encapsulates = new ASN1 (0x04, safeBagSequence.GetBytes ());
1096                         ASN1 ci = new ASN1 (0xA0);
1097                         ci.Add (encapsulates);
1098                         PKCS7.ContentInfo authSafe = new PKCS7.ContentInfo (PKCS7.Oid.data);
1099                         authSafe.Content = ci;
1100
1101                         ASN1 macData = new ASN1 (0x30);
1102                         if (_password != null) {
1103                                 // only for password based encryption
1104                                 byte[] salt = new byte [20];
1105                                 RNG.GetBytes (salt);
1106                                 byte[] macValue = MAC (_password, salt, _iterations, authSafe.Content [0].Value);
1107                                 ASN1 oidSeq = new ASN1 (0x30);
1108                                 oidSeq.Add (ASN1Convert.FromOid ("1.3.14.3.2.26"));     // SHA1
1109                                 oidSeq.Add (new ASN1 (0x05));
1110
1111                                 ASN1 mac = new ASN1 (0x30);
1112                                 mac.Add (oidSeq);
1113                                 mac.Add (new ASN1 (0x04, macValue));
1114
1115                                 macData.Add (mac);
1116                                 macData.Add (new ASN1 (0x04, salt));
1117                                 macData.Add (ASN1Convert.FromInt32 (_iterations));
1118                         }
1119
1120                         ASN1 version = new ASN1 (0x02, new byte [1] { 0x03 });
1121
1122                         ASN1 pfx = new ASN1 (0x30);
1123                         pfx.Add (version);
1124                         pfx.Add (authSafe.ASN1);
1125                         if (macData.Count > 0) {
1126                                 // only for password based encryption
1127                                 pfx.Add (macData);
1128                         }
1129
1130                         return pfx.GetBytes ();
1131                 }
1132
1133                 public void AddCertificate (X509Certificate cert)
1134                 {
1135                         AddCertificate (cert, null);
1136                 }
1137
1138                 public void AddCertificate (X509Certificate cert, IDictionary attributes)
1139                 {
1140                         bool found = false;
1141
1142                         for (int i = 0; !found && i < _safeBags.Count; i++) {
1143                                 SafeBag sb = (SafeBag)_safeBags [i];
1144
1145                                 if (sb.BagOID.Equals (certBag)) {
1146                                         ASN1 safeBag = sb.ASN1;
1147                                         ASN1 bagValue = safeBag [1];
1148                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1149                                         X509Certificate c = new X509Certificate (crt.Content [0].Value);
1150                                         if (Compare (cert.RawData, c.RawData)) {
1151                                                 found = true;
1152                                         }
1153                                 }
1154                         }
1155
1156                         if (!found) {
1157                                 _safeBags.Add (new SafeBag (certBag, CertificateSafeBag (cert, attributes)));
1158                                 _certsChanged = true;
1159                         }
1160                 }
1161
1162                 public void RemoveCertificate (X509Certificate cert)
1163                 {
1164                         RemoveCertificate (cert, null);
1165                 }
1166
1167                 public void RemoveCertificate (X509Certificate cert, IDictionary attrs)
1168                 {
1169                         int certIndex = -1;
1170
1171                         for (int i = 0; certIndex == -1 && i < _safeBags.Count; i++) {
1172                                 SafeBag sb = (SafeBag)_safeBags [i];
1173
1174                                 if (sb.BagOID.Equals (certBag)) {
1175                                         ASN1 safeBag = sb.ASN1;
1176                                         ASN1 bagValue = safeBag [1];
1177                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1178                                         X509Certificate c = new X509Certificate (crt.Content [0].Value);
1179                                         if (Compare (cert.RawData, c.RawData)) {
1180                                                 if (attrs != null) {
1181                                                         if (safeBag.Count == 3) {
1182                                                                 ASN1 bagAttributes = safeBag [2];
1183                                                                 int bagAttributesFound = 0;
1184                                                                 for (int j = 0; j < bagAttributes.Count; j++) {
1185                                                                         ASN1 pkcs12Attribute = bagAttributes [j];
1186                                                                         ASN1 attrId = pkcs12Attribute [0];
1187                                                                         string ao = ASN1Convert.ToOid (attrId);
1188                                                                         ArrayList dattrValues = (ArrayList)attrs [ao];
1189
1190                                                                         if (dattrValues != null) {
1191                                                                                 ASN1 attrValues = pkcs12Attribute [1];
1192
1193                                                                                 if (dattrValues.Count == attrValues.Count) {
1194                                                                                         int attrValuesFound = 0;
1195                                                                                         for (int k = 0; k < attrValues.Count; k++) {
1196                                                                                                 ASN1 attrValue = attrValues [k];
1197                                                                                                 byte[] value = (byte[])dattrValues [k];
1198
1199                                                                                                 if (Compare (value, attrValue.Value)) {
1200                                                                                                         attrValuesFound += 1;
1201                                                                                                 }
1202                                                                                         }
1203                                                                                         if (attrValuesFound == attrValues.Count) {
1204                                                                                                 bagAttributesFound += 1;
1205                                                                                         }
1206                                                                                 }
1207                                                                         }
1208                                                                 }
1209                                                                 if (bagAttributesFound == bagAttributes.Count) {
1210                                                                         certIndex = i;
1211                                                                 }
1212                                                         }
1213                                                 } else {
1214                                                         certIndex = i;
1215                                                 }
1216                                         }
1217                                 }
1218                         }
1219
1220                         if (certIndex != -1) {
1221                                 _safeBags.RemoveAt (certIndex);
1222                                 _certsChanged = true;
1223                         }
1224                 }
1225
1226                 private bool CompareAsymmetricAlgorithm (AsymmetricAlgorithm a1, AsymmetricAlgorithm a2)
1227                 {
1228                         bool result = a1.KeyExchangeAlgorithm.Equals (a2.KeyExchangeAlgorithm);
1229                         result = result && a1.KeySize == a2.KeySize;
1230
1231                         KeySizes[] keysizes = a2.LegalKeySizes;
1232                         if (a1.LegalKeySizes.Length != keysizes.Length)
1233                                 return false;
1234
1235                         for (int i = 0; i < a1.LegalKeySizes.Length; i++) {
1236                                 result = result && CompareKeySizes (a1.LegalKeySizes [i], keysizes [i]);
1237                         }
1238
1239                         result = result && a1.SignatureAlgorithm == a2.SignatureAlgorithm;
1240
1241                         return result;
1242                 }
1243
1244                 private bool CompareKeySizes (KeySizes k1, KeySizes k2)
1245                 {
1246                         bool result = k1.MaxSize == k2.MaxSize;
1247                         result = result && k1.MinSize == k2.MinSize;
1248                         result = result && k1.SkipSize == k2.SkipSize;
1249                         return result;
1250                 }
1251
1252                 public void AddPkcs8ShroudedKeyBag (AsymmetricAlgorithm aa)
1253                 {
1254                         AddPkcs8ShroudedKeyBag (aa, null);
1255                 }
1256
1257                 public void AddPkcs8ShroudedKeyBag (AsymmetricAlgorithm aa, IDictionary attributes)
1258                 {
1259                         bool found = false;
1260
1261                         for (int i = 0; !found && i < _safeBags.Count; i++) {
1262                                 SafeBag sb = (SafeBag)_safeBags [i];
1263
1264                                 if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1265                                         ASN1 bagValue = sb.ASN1 [1];
1266                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1267                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1268                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1269                                         byte[] privateKey = pki.PrivateKey;
1270
1271                                         AsymmetricAlgorithm saa = null;
1272                                         switch (privateKey [0]) {
1273                                         case 0x02:
1274                                                 DSAParameters p = new DSAParameters (); // FIXME
1275                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1276                                                 break;
1277                                         case 0x30:
1278                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1279                                                 break;
1280                                         default:
1281                                                 Array.Clear (decrypted, 0, decrypted.Length);
1282                                                 Array.Clear (privateKey, 0, privateKey.Length);
1283                                                 throw new CryptographicException ("Unknown private key format");
1284                                         }
1285
1286                                         Array.Clear (decrypted, 0, decrypted.Length);
1287                                         Array.Clear (privateKey, 0, privateKey.Length);
1288
1289                                         if (CompareAsymmetricAlgorithm (aa , saa)) {
1290                                                 found = true;
1291                                         }
1292                                 }
1293                         }
1294
1295                         if (!found) {
1296                                 _safeBags.Add (new SafeBag (pkcs8ShroudedKeyBag, Pkcs8ShroudedKeyBagSafeBag (aa, attributes)));
1297                                 _keyBagsChanged = true;
1298                         }
1299                 }
1300
1301                 public void RemovePkcs8ShroudedKeyBag (AsymmetricAlgorithm aa)
1302                 {
1303                         int aaIndex = -1;
1304
1305                         for (int i = 0; aaIndex == -1 && i < _safeBags.Count; i++) {
1306                                 SafeBag sb = (SafeBag)_safeBags [i];
1307
1308                                 if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1309                                         ASN1 bagValue = sb.ASN1 [1];
1310                                         PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1311                                         byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1312                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1313                                         byte[] privateKey = pki.PrivateKey;
1314
1315                                         AsymmetricAlgorithm saa = null;
1316                                         switch (privateKey [0]) {
1317                                         case 0x02:
1318                                                 DSAParameters p = new DSAParameters (); // FIXME
1319                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1320                                                 break;
1321                                         case 0x30:
1322                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1323                                                 break;
1324                                         default:
1325                                                 Array.Clear (decrypted, 0, decrypted.Length);
1326                                                 Array.Clear (privateKey, 0, privateKey.Length);
1327                                                 throw new CryptographicException ("Unknown private key format");
1328                                         }
1329
1330                                         Array.Clear (decrypted, 0, decrypted.Length);
1331                                         Array.Clear (privateKey, 0, privateKey.Length);
1332
1333                                         if (CompareAsymmetricAlgorithm (aa, saa)) {
1334                                                 aaIndex = i;
1335                                         }
1336                                 }
1337                         }
1338
1339                         if (aaIndex != -1) {
1340                                 _safeBags.RemoveAt (aaIndex);
1341                                 _keyBagsChanged = true;
1342                         }
1343                 }
1344
1345                 public void AddKeyBag (AsymmetricAlgorithm aa)
1346                 {
1347                         AddKeyBag (aa, null);
1348                 }
1349
1350                 public void AddKeyBag (AsymmetricAlgorithm aa, IDictionary attributes)
1351                 {
1352                         bool found = false;
1353
1354                         for (int i = 0; !found && i < _safeBags.Count; i++) {
1355                                 SafeBag sb = (SafeBag)_safeBags [i];
1356
1357                                 if (sb.BagOID.Equals (keyBag)) {
1358                                         ASN1 bagValue = sb.ASN1 [1];
1359                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1360                                         byte[] privateKey = pki.PrivateKey;
1361
1362                                         AsymmetricAlgorithm saa = null;
1363                                         switch (privateKey [0]) {
1364                                         case 0x02:
1365                                                 DSAParameters p = new DSAParameters (); // FIXME
1366                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1367                                                 break;
1368                                         case 0x30:
1369                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1370                                                 break;
1371                                         default:
1372                                                 Array.Clear (privateKey, 0, privateKey.Length);
1373                                                 throw new CryptographicException ("Unknown private key format");
1374                                         }
1375
1376                                         Array.Clear (privateKey, 0, privateKey.Length);
1377
1378                                         if (CompareAsymmetricAlgorithm (aa, saa)) {
1379                                                 found = true;
1380                                         }
1381                                 }
1382                         }
1383
1384                         if (!found) {
1385                                 _safeBags.Add (new SafeBag (keyBag, KeyBagSafeBag (aa, attributes)));
1386                                 _keyBagsChanged = true;
1387                         }
1388                 }
1389
1390                 public void RemoveKeyBag (AsymmetricAlgorithm aa)
1391                 {
1392                         int aaIndex = -1;
1393
1394                         for (int i = 0; aaIndex == -1 && i < _safeBags.Count; i++) {
1395                                 SafeBag sb = (SafeBag)_safeBags [i];
1396
1397                                 if (sb.BagOID.Equals (keyBag)) {
1398                                         ASN1 bagValue = sb.ASN1 [1];
1399                                         PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1400                                         byte[] privateKey = pki.PrivateKey;
1401
1402                                         AsymmetricAlgorithm saa = null;
1403                                         switch (privateKey [0]) {
1404                                         case 0x02:
1405                                                 DSAParameters p = new DSAParameters (); // FIXME
1406                                                 saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1407                                                 break;
1408                                         case 0x30:
1409                                                 saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1410                                                 break;
1411                                         default:
1412                                                 Array.Clear (privateKey, 0, privateKey.Length);
1413                                                 throw new CryptographicException ("Unknown private key format");
1414                                         }
1415
1416                                         Array.Clear (privateKey, 0, privateKey.Length);
1417
1418                                         if (CompareAsymmetricAlgorithm (aa, saa)) {
1419                                                 aaIndex = i;
1420                                         }
1421                                 }
1422                         }
1423
1424                         if (aaIndex != -1) {
1425                                 _safeBags.RemoveAt (aaIndex);
1426                                 _keyBagsChanged = true;
1427                         }
1428                 }
1429
1430
1431                 public AsymmetricAlgorithm GetAsymmetricAlgorithm (IDictionary attrs)
1432                 {
1433                         foreach (SafeBag sb in _safeBags) {
1434                                 if (sb.BagOID.Equals (keyBag) || sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1435                                         ASN1 safeBag = sb.ASN1;
1436
1437                                         if (safeBag.Count == 3) {
1438                                                 ASN1 bagAttributes = safeBag [2];
1439
1440                                                 int bagAttributesFound = 0;
1441                                                 for (int i = 0; i < bagAttributes.Count; i++) {
1442                                                         ASN1 pkcs12Attribute = bagAttributes [i];
1443                                                         ASN1 attrId = pkcs12Attribute [0];
1444                                                         string ao = ASN1Convert.ToOid (attrId);
1445                                                         ArrayList dattrValues = (ArrayList)attrs [ao];
1446
1447                                                         if (dattrValues != null) {
1448                                                                 ASN1 attrValues = pkcs12Attribute [1];
1449
1450                                                                 if (dattrValues.Count == attrValues.Count) {
1451                                                                         int attrValuesFound = 0;
1452                                                                         for (int j = 0; j < attrValues.Count; j++) {
1453                                                                                 ASN1 attrValue = attrValues [j];
1454                                                                                 byte[] value = (byte[])dattrValues [j];
1455
1456                                                                                 if (Compare (value, attrValue.Value)) {
1457                                                                                         attrValuesFound += 1;
1458                                                                                 }
1459                                                                         }
1460                                                                         if (attrValuesFound == attrValues.Count) {
1461                                                                                 bagAttributesFound += 1;
1462                                                                         }
1463                                                                 }
1464                                                         }
1465                                                 }
1466                                                 if (bagAttributesFound == bagAttributes.Count) {
1467                                                         ASN1 bagValue = safeBag [1];
1468                                                         AsymmetricAlgorithm aa = null;
1469                                                         if (sb.BagOID.Equals (keyBag)) {
1470                                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1471                                                                 byte[] privateKey = pki.PrivateKey;
1472                                                                 switch (privateKey [0]) {
1473                                                                 case 0x02:
1474                                                                         DSAParameters p = new DSAParameters (); // FIXME
1475                                                                         aa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1476                                                                         break;
1477                                                                 case 0x30:
1478                                                                         aa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1479                                                                         break;
1480                                                                 default:
1481                                                                         break;
1482                                                                 }
1483                                                                 Array.Clear (privateKey, 0, privateKey.Length);
1484                                                         } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1485                                                                 PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1486                                                                 byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1487                                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1488                                                                 byte[] privateKey = pki.PrivateKey;
1489                                                                 switch (privateKey [0]) {
1490                                                                 case 0x02:
1491                                                                         DSAParameters p = new DSAParameters (); // FIXME
1492                                                                         aa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1493                                                                         break;
1494                                                                 case 0x30:
1495                                                                         aa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1496                                                                         break;
1497                                                                 default:
1498                                                                         break;
1499                                                                 }
1500                                                                 Array.Clear (privateKey, 0, privateKey.Length);
1501                                                                 Array.Clear (decrypted, 0, decrypted.Length);
1502                                                         }
1503                                                         return aa;
1504                                                 }
1505                                         }
1506                                 }
1507                         }
1508
1509                         return null;
1510                 }
1511
1512                 public X509Certificate GetCertificate (IDictionary attrs)
1513                 {
1514                         foreach (SafeBag sb in _safeBags) {
1515                                 if (sb.BagOID.Equals (certBag)) {
1516                                         ASN1 safeBag = sb.ASN1;
1517
1518                                         if (safeBag.Count == 3) {
1519                                                 ASN1 bagAttributes = safeBag [2];
1520
1521                                                 int bagAttributesFound = 0;
1522                                                 for (int i = 0; i < bagAttributes.Count; i++) {
1523                                                         ASN1 pkcs12Attribute = bagAttributes [i];
1524                                                         ASN1 attrId = pkcs12Attribute [0];
1525                                                         string ao = ASN1Convert.ToOid (attrId);
1526                                                         ArrayList dattrValues = (ArrayList)attrs [ao];
1527
1528                                                         if (dattrValues != null) {
1529                                                                 ASN1 attrValues = pkcs12Attribute [1];
1530
1531                                                                 if (dattrValues.Count == attrValues.Count) {
1532                                                                         int attrValuesFound = 0;
1533                                                                         for (int j = 0; j < attrValues.Count; j++) {
1534                                                                                 ASN1 attrValue = attrValues [j];
1535                                                                                 byte[] value = (byte[])dattrValues [j];
1536
1537                                                                                 if (Compare (value, attrValue.Value)) {
1538                                                                                         attrValuesFound += 1;
1539                                                                                 }
1540                                                                         }
1541                                                                         if (attrValuesFound == attrValues.Count) {
1542                                                                                 bagAttributesFound += 1;
1543                                                                         }
1544                                                                 }
1545                                                         }
1546                                                 }
1547                                                 if (bagAttributesFound == bagAttributes.Count) {
1548                                                         ASN1 bagValue = safeBag [1];
1549                                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1550                                                         return new X509Certificate (crt.Content [0].Value);
1551                                                 }
1552                                         }
1553                                 }
1554                         }
1555
1556                         return null;
1557                 }
1558
1559                 public IDictionary GetAttributes (AsymmetricAlgorithm aa)
1560                 {
1561                         IDictionary result = new Hashtable ();
1562
1563                         foreach (SafeBag sb in _safeBags) {
1564                                 if (sb.BagOID.Equals (keyBag) || sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1565                                         ASN1 safeBag = sb.ASN1;
1566
1567                                         ASN1 bagValue = safeBag [1];
1568                                         AsymmetricAlgorithm saa = null;
1569                                         if (sb.BagOID.Equals (keyBag)) {
1570                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (bagValue.Value);
1571                                                 byte[] privateKey = pki.PrivateKey;
1572                                                 switch (privateKey [0]) {
1573                                                 case 0x02:
1574                                                         DSAParameters p = new DSAParameters (); // FIXME
1575                                                         saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1576                                                         break;
1577                                                 case 0x30:
1578                                                         saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1579                                                         break;
1580                                                 default:
1581                                                         break;
1582                                                 }
1583                                                 Array.Clear (privateKey, 0, privateKey.Length);
1584                                         } else if (sb.BagOID.Equals (pkcs8ShroudedKeyBag)) {
1585                                                 PKCS8.EncryptedPrivateKeyInfo epki = new PKCS8.EncryptedPrivateKeyInfo (bagValue.Value);
1586                                                 byte[] decrypted = Decrypt (epki.Algorithm, epki.Salt, epki.IterationCount, epki.EncryptedData);
1587                                                 PKCS8.PrivateKeyInfo pki = new PKCS8.PrivateKeyInfo (decrypted);
1588                                                 byte[] privateKey = pki.PrivateKey;
1589                                                 switch (privateKey [0]) {
1590                                                 case 0x02:
1591                                                         DSAParameters p = new DSAParameters (); // FIXME
1592                                                         saa = PKCS8.PrivateKeyInfo.DecodeDSA (privateKey, p);
1593                                                         break;
1594                                                 case 0x30:
1595                                                         saa = PKCS8.PrivateKeyInfo.DecodeRSA (privateKey);
1596                                                         break;
1597                                                 default:
1598                                                         break;
1599                                                 }
1600                                                 Array.Clear (privateKey, 0, privateKey.Length);
1601                                                 Array.Clear (decrypted, 0, decrypted.Length);
1602                                         }
1603
1604                                         if (saa != null && CompareAsymmetricAlgorithm (saa, aa)) {
1605                                                 if (safeBag.Count == 3) {
1606                                                         ASN1 bagAttributes = safeBag [2];
1607
1608                                                         for (int i = 0; i < bagAttributes.Count; i++) {
1609                                                                 ASN1 pkcs12Attribute = bagAttributes [i];
1610                                                                 ASN1 attrId = pkcs12Attribute [0];
1611                                                                 string aOid = ASN1Convert.ToOid (attrId);
1612                                                                 ArrayList aValues = new ArrayList ();
1613
1614                                                                 ASN1 attrValues = pkcs12Attribute [1];
1615
1616                                                                 for (int j = 0; j < attrValues.Count; j++) {
1617                                                                         ASN1 attrValue = attrValues [j];
1618                                                                         aValues.Add (attrValue.Value);
1619                                                                 }
1620                                                                 result.Add (aOid, aValues);
1621                                                         }
1622                                                 }
1623                                         }
1624                                 }
1625                         }
1626
1627                         return result;
1628                 }
1629
1630                 public IDictionary GetAttributes (X509Certificate cert)
1631                 {
1632                         IDictionary result = new Hashtable ();
1633
1634                         foreach (SafeBag sb in _safeBags) {
1635                                 if (sb.BagOID.Equals (certBag)) {
1636                                         ASN1 safeBag = sb.ASN1;
1637                                         ASN1 bagValue = safeBag [1];
1638                                         PKCS7.ContentInfo crt = new PKCS7.ContentInfo (bagValue.Value);
1639                                         X509Certificate xc = new X509Certificate (crt.Content [0].Value);
1640
1641                                         if (Compare (cert.RawData, xc.RawData)) {
1642                                                 if (safeBag.Count == 3) {
1643                                                         ASN1 bagAttributes = safeBag [2];
1644
1645                                                         for (int i = 0; i < bagAttributes.Count; i++) {
1646                                                                 ASN1 pkcs12Attribute = bagAttributes [i];
1647                                                                 ASN1 attrId = pkcs12Attribute [0];
1648
1649                                                                 string aOid = ASN1Convert.ToOid (attrId);
1650                                                                 ArrayList aValues = new ArrayList ();
1651
1652                                                                 ASN1 attrValues = pkcs12Attribute [1];
1653
1654                                                                 for (int j = 0; j < attrValues.Count; j++) {
1655                                                                         ASN1 attrValue = attrValues [j];
1656                                                                         aValues.Add (attrValue.Value);
1657                                                                 }
1658                                                                 result.Add (aOid, aValues);
1659                                                         }
1660                                                 }
1661                                         }
1662                                 }
1663                         }
1664
1665                         return result;
1666                 }
1667
1668                 public void SaveToFile (string filename)
1669                 {
1670                         if (filename == null)
1671                                 throw new ArgumentNullException ("filename");
1672
1673                         using (FileStream fs = File.OpenWrite (filename)) {
1674                                 byte[] data = GetBytes ();
1675                                 fs.Write (data, 0, data.Length);
1676                                 fs.Flush ();
1677                                 fs.Close ();
1678                         }
1679                 }
1680
1681                 public object Clone ()
1682                 {
1683                         PKCS12 clone = null;
1684                         if (_password != null) {
1685                                 clone = new PKCS12 (GetBytes (), Encoding.BigEndianUnicode.GetString (_password));
1686                         } else {
1687                                 clone = new PKCS12 (GetBytes ());
1688                         }
1689                         clone.IterationCount = this.IterationCount;
1690
1691                         return clone;
1692                 }
1693
1694                 // static methods
1695
1696                 static private byte[] LoadFile (string filename)
1697                 {
1698                         byte[] data = null;
1699                         using (FileStream fs = File.OpenRead (filename)) {
1700                                 data = new byte [fs.Length];
1701                                 fs.Read (data, 0, data.Length);
1702                                 fs.Close ();
1703                         }
1704                         return data;
1705                 }
1706
1707                 static public PKCS12 LoadFromFile (string filename)
1708                 {
1709                         if (filename == null)
1710                                 throw new ArgumentNullException ("filename");
1711
1712                         return new PKCS12 (LoadFile (filename));
1713                 }
1714
1715                 static public PKCS12 LoadFromFile (string filename, string password)
1716                 {
1717                         if (filename == null)
1718                                 throw new ArgumentNullException ("filename");
1719
1720                         return new PKCS12 (LoadFile (filename), password);
1721                 }
1722         }
1723 }